Improvement in wax-thread sewing-machines



y R1.` ASHEl ZSheets--Sheetl- Wax-Thread Sewing-Machine.

No. 130,556. Patented Aug. 20,18'7

UNITED STATES PATENT CEEIOE,

ROBERT ASHE, OE BOSTON, MASSACHUSETTS, ASSTGNOR To AMOS L. woon,

TRUSTEE, OE SAME PLAGE.`

IMPROVEMENT IN WAX-THREAD SEWING-MACHINES.

Specilication forming part of Letters Patent No. 130,556, dated August20,1872'.

To all whom it may concern:

Be it known that I, ROEERTASHE, of ABoston, in the county of Sul'olk andState of Massachusetts, have invented an Improvef ment in Wax-ThreadSewing-Machines 5 and I i do hereby declare that the following, taken inconnection with the drawing which accompaf nies and forms part of thisspecification, is a description of my invention sufficient to enable.those skilled in the art to practice it.

4The invention relates to that class of sewin g-machines particularlydesigned for sewing With waxed thread, and in which each machine employsa hook-needle, working up through a plate at the top of a post, andanawl and a presser-foot working down from above the plate, the stockbeing fed by a lateral move,- ment of the needle when the `needle is inthe work. In my invention, the post is stationary, and theneedle-barslides in an arm or bearing which extends up from arocker-plate hung upon a studpin projecting from the front of the post,and in another arm or bearing extendin g down fromthe rocker-plate,- thelower `arm* being connected to an arm on the end of a rocker-shaft, thereciprocating rotative movement of the shaft imparting the vibratorymovement to the rocker-plate to eiiect `the forward feed movement of theneedle when in the work, and its back movement when its point is belowthe work. This specifre methodof eiecting the feed constitutes onefeature of my invention. 4An arm at the 'opposite end of therocker-shaft is connected to a vertical arm extending' down from ahorizontal rockersleeve or quill, at whose other end is a horizontalarm, from which a pin extends into a cam on the ily-wheel shaft. Theconnection of the arms is edected by an adjustableslidablock, bymovement of which the throw of the rocker-shaft is varied to vary thefeed.` At the end of the cam-wheel shaft is a crank, the pin from whichextends into a vertically-reciprocatingbar, which is connected at itsfoot to an arm extending from a horizontal rocker-shaft, at whose otherend is an arm jointed by a'link to a clamp xed to the needle-bar, theconnection of the bar to the rocker-arm being effected by a slide thatper- Vmits the bar to oscillate, the needle-bar re- `mailling at restdnring the lateralmovements l presser -foot; m,

of the crank-operated bar, and being raised and depressed by thevertical movements of the bar'eiected by the ,crank-pin., Said barextends above the cam-wheel, and is jointed at top to an arm on one endof another rocker-shaft, at whose'. opposite end isan arm,

only in the method of hanging the rocker-V plate that carries thebearings in which the needle-bar slides, but in the construction orarrangement of the mechanism that actuates the said rocker-plate, andpermits its throw to be adjusted, and the mechanism that actuates theneedle-bar and the awl-bar.

The drawing represents a machine embodying my invention.` f

A shows the machine in side elevation. B is a front elevation of it; C,a rear elevation.

c denotes the frame, composed of the base, upright, and goose-neck arm.At the front end of the base is the stationary post b, having at its topthe needle-throat plate or worksupporting'plate c, provision beingmadefor the support of a table to surround this plate and extend to theupright d, as in other machines of this kind. c denotes the hook-needle;f, the needle-bar; g, the cast-off;` h, the cast-oft' bar 5 i, the awl;7c, the awl-bar; l, the the presser-foot bar; n, the thread-guide; `o,the threadguide bar;` all these parts, except as to their means ofactuation, being the same as in other machines of this class. Upon thefront of the post is a pin, p, upon4 which is pivoted Vthe rocker-plateq, having two bearings, r s, in which slide the needle-bar f and thecast-Oifbar h. To the lower bearing .s is jointed (bya sliding oriexible connection) an arm, t, extending from fthe end of a longroeker-shaft,u, mountedin sta-- tionary bearings. At the opposite end ofthis shaftis a vertical arm, c, which is jointed-to an arm, w, extendingfrom a rocker-sleeve, y, (that turns on a pin, 90,) there being at theoppositeend of this sleeve a horizontal arm, z, from which a pin, a2,extends into a cam-groove, t2, of a cam-wheel, c2, fixed ona rotaryiiywheel and driving-shaft, 12v The arm 'v is jointed or connected tothe arm w by a bolt, e2, that has a head, f2, which enters a slot orgroove, g2, in the arm c, the bolt being coniined in place to the arm fwby a nut, h2. The bolt passes through a slot, i2, cut through the armfw, and, by means of this slot and the groove g2, the bolt may be moved,and the throw of the arm thereby variably adjusted. The connection ofthe rocker-shaft to the bea-ring-plate q eii'ects the oscillation ofsaid plate and the consequent feed or forward movement and the backmovement of the needle; and, by the' provision for adjustment of theconnection between the arms c w, the extent of feed movement of theneedle may be varied as occasion may require. YThe lateral or feed move-Vment of the needle being thus produced, its 'vertical movements areeifected as follows:

The needle-bar passes through a clamp, k2

which is fastened to the'bar by a screw, l2, an

this clamp is connected, by a link, m2, to an arm, n2, extending fromone end of a horizon- 'tal rocker-shaft, o2, (mounted and turning instationary bearings,) from whose other end an arm, p2, extends. This armp2 has a slot, q2, in which plays a slide, T2, atthe end of a bolt,$2,1ixed to and extending from a bar, t2. This bar is hung upon a pin,u2, extending from a crank, c2, at the end of the cam-wheel an'ddriving-shaft d2. As the crankpin, in the rotation of the shaft, raisesthe bar the arm p2 is raised, the rocker-shaft is turned, and the nee- Idle is thrown up for its point to enter and pass through the work andthe thread to be laid in its hook, and the continued movement'of theshaft causes the needle to be drawn down with the thread, the upwardmovement of the needle, its feed movement, and its downward movementtaking place together and without intermission; but when the needle isdown, or nearly down, there is a short pause or slowling77 of itsmovement during the-time the slide is passing from the outer end of theslot q? to the inner end thereof, there being, of course, a rapidvertical movement of the bar when the crank-pin is moving vertically,and but a slight vertical movement when the pin is in or near a verticalplane. The vertical throw of the needle may be adjustably regulated bychanging the position of the connecting-bolt s2 with reference to aslot, y2, in the bar t. At the top of the bar t2 it is jointed to anarm, z2, extending from one end of a rocker-shaft, a3, at whose otherend is an arm, ba, that is jointed to the awlbar 7a, and thereciprocating vertical movements of the awlbar are thus effected by thelactionof the crank-pin la'fupon `the bar t2. lThewconnection of 'theYarm z2 to 'the bar lis slightly adjustable by means of a bolt, d?, nutc3, and slot f3; but when the machine is in operation there is nosliding movement of the connection, all the lateral movement of thecrank-operated bar being effected through the provision for slidingmovement of the connection of the foot of 4the bar t? to the arm p2, bymeans of the slide r2 and slot q2, and through this provision the timingof the respective movements of the needle and awl are eifected.

Whenever the bar is moving up, the awlbar and needle-bar must, ofcourse, both rise, but while the crank-pin is passing its verticalcenter the awl-bar will be comparatively stationary, while the lateralmovement of the foot of the crank-bar will cause the needlebar to have aconsiderable vertical movement.

When the crank-pin, having passed its lowf er center, begins to rise,the awl is in the work and the point of the needle is brought very nearto the; point of the awl, so that asthe awl rises from the work theneedle enters the awl-hole. The points rise nearly together un-` til theneedle-point is well through the work. When the crank-pin begins. torise through the upper quarter of its rotation, the lateral move'- mentof the crank-bar begins; but as the up; per end of the bar has nolateral movement, the awl-bar moves faster than the needle-bar, thevertical movement of the end of the crankbar that actuates theneedle-bar having to be Y modified by its lateral movement. The awl,therefore, moves faster than the needle, and increases the space betweentheir points, and the action of thecrank-bar upon the arm causes theneedle to beginy to descend while the awl is completing its ascent. Theawl having risen, remains still, or does` not begin to de soend untilthe work has been fed, the thread laid in the hook of the needle, andthe needle point is below the work. Then it descends and punctures thework and remains atl its lowest position and in the work, until thencedle, having been moved back and brought into vertical line with the awl,again starts up, its point nearly reaching the work before the awlbegins to rise, and entering the work before the awl leaves the work.The presser-foot bar m is `raised by a projection from the arm b3, whichstrikes a piece, g3, flxed on the bar m, and it is thrown down by thestress of a spring, o3, when the awl-bar descends. .The ,threadguide baris thrown forward by the action of a hook, h3, upon a roll, i3, whenthe-awl-bar rises, and is thrown back by a spring, k3, when the awl-bardescends. The cast-o bar is act-` uated by the action of a projection,Z3, from the needle-bar, alternately, upon two pieces, m3 n3, onthecast-off bar.

' The camwheel c2 is made adjustable on the Icrank-shaft and withreference to the crankarm, for which purpose the crank has an arm, p3,in which is a slot, g3, through which slot extends a bolt, 1'3,that`fastens the arm and 'camtogethen By loosing this bolt the ca'm wheel maybe adjustably turned with refer ence to' the crank-arm, and by thesemeans the action of the cam to effect the feed may be adjustably timedwith reference to the action of the crank, to effect the verticalmovements of the aWl and needle.

I claim- 1. In combination with the stationary post, the pivoted andswinging bearing-plate q, carrying a needle-bar and cast-off bar, andconnected to a rocking-arm, t, by a sliding connection, substantially asshown and described.

2. The rocker-shaft u and its arms t o, and the rocker-sleeve y and itsarms w z, and the cam-wheel c, arranged and operating together,substantially as shown and described.

3. The rocker-shaft o2, slotted arm p2, arm n2, crank-bar t2, crank o2,rocker-shaft a3, and arms z2 b3, for actuating the needle and aWlbars,substantially as shown and described.

4. The combination with the presser-foot and thread-guide, for thepurpose of imparting the upward movement of the presser-foot and theforward movement of the thread-guide, of the arm b3 that reciprocatesthe aWLbar, their opposite movements being produced by springs,substantially as shown and described.

5. In combination with the crank, the cam- Wheel c2, made adjustable onthe crankshaft, substantially as and for the purpose described.

6. The arrangement of the slotted arm p2, rocker-shaft o2, rocking-bart, operated as described, and slotted at its lower end, andtheadjusting-pin s2, as shown and described.

7. In combination with a needle-bar and an awl-bar, operating in line orfrom opposite sides of the work-plate, a single crank with interveningmechanism for imparting the respective movements to the respective bars.

Executed J une 6, 1872.

ROBERT ASEE.

Witnesses:

FRANCIS GoULD, M. W. FROTHINGHAM.

